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    • 7. 发明授权
    • Process for producing N-chlorocarbonyl isocyanide dichloride
    • 制备N-氯羰基异腈二氯化物的方法
    • US3956089A
    • 1976-05-11
    • US544021
    • 1975-01-24
    • Hermann HagemannHerbert SchwarzFritz Doring
    • Hermann HagemannHerbert SchwarzFritz Doring
    • C07C271/00C07C20060101C07C67/00C07C239/00B01J1/10
    • N-chlorocarbonyl isocyanide dichloride is prepared by chlorinating methyl isocyanate and/or methyl carbamic acid chloride in solution in the presence of ultraviolet light at a temperature in the range of from 30.degree. to 120.degree.C. The temperature pattern during the reaction is controlled in relation to the concentration of methyl isocyanate in the reaction mixture such that low temperatures are maintained for high concentrations while high temperatures are maintained with low concentrations. Thus, when a temperature of from 30.degree.-40.degree.C is maintained during the reaction, the concentration of methyl isocyanate in the reaction mixture is substantially more than 50 percent; when the temperature is increased to 65.degree. to 75.degree.C, the concentration of methyl isocyanate is in the range of 50 percent to 10 percent; and when the temperature is increased above 75.degree.C, the concentration of methyl isocyanate is substantially below 10 percent.
    • 氯化异氰酸甲酯和/或甲基氨基甲酸氯化物在紫外线的存在下,在30〜120℃的温度范围内,通过氯化甲基氨基甲酰氯来制备N-氯羰基异氰化物二氯化物。反应过程中的温度控制在 与反应混合物中甲基异氰酸酯的浓度的关系,使得在高浓度下保持低温保持高浓度,同时以低浓度保持高温。 因此,当反应期间保持30〜40℃的温度时,反应混合物中甲基异氰酸酯的浓度大致超过50%; 当温度升高至65℃至75℃时,异氰酸甲酯的浓度在50%至10%的范围内; 当温度升高到75℃以上时,异氰酸甲酯的浓度显着低于10%。